[ethresear.ch] [Layer 2/ZK Rollup] Ephemeral Rollup: The New "L1.5" of Ethereum

Interesting.

If the wallet is then the only thing holding its state, how does a recipient discover and receive new private notes?

And if a wallet loses its local state, can the user recover everything from a seed and public chain data? Or would we need some kind of re-sync or request of each possible ERC20’s balances of that wallet, not to mention contracts will less predictable state (custom standards or custom markets)?